The easiest way to change your record directory for Windows XP Media Center Edition is to install the Tweak MCE Power Toy from Microsoft. If Tweak MCE doesn't work with your version Media Center, here's an optional method for changing the record location:
Change the RecordPath value in the Registry to point to the new folder:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Media Center\Service\Recording = REG_SZ "{system drive}:\Documents and Settings\{username}\My Documents\PSPWare\Dropboxes\Movies"
To make sure your recording list stays up to date in Media Center, edit the Watched Folders key. If the Registry Key does not exist, create it.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Media
Center\Service\Recording\WatchedFolders = REG_MULTI_SZ "C:\Documents and Settings\All Users\Documents\Recorded TV {system drive}:\Documents and Settings\{username}\My Documents\PSPWare\Dropboxes\Movies"
Close and restart Windows Media Center for changes to take effect.
